197491953 has 16 divisors (see below), whose sum is σ = 269179200. Its totient is φ = 128758080.

The previous prime is 197491919. The next prime is 197491963. The reversal of 197491953 is 359194791.

It is not a de Polignac number, because 197491953 - 2¹⁰ = 197490929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197491913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29743 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (16823700).

Almost surely, 2^197491953 is an apocalyptic number.

It is an amenable number.

197491953 is a deficient number, since it is larger than the sum of its proper divisors (71687247).

197491953 is a wasteful number, since it uses less digits than its factorization.

197491953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272.

The product of its digits is 306180, while the sum is 48.

The square root of 197491953 is about 14053.1830202271. The cubic root of 197491953 is about 582.3487329098.

The spelling of 197491953 in words is "one hundred ninety-seven million, four hundred ninety-one thousand, nine hundred fifty-three".